Do they ever stop? I mean, if the sale of this year’s Francis Bacon portrait of lover Peter Lacy is “the greatest,” what will Sotheby’s say when they try to sell another one? “Second-greatest”? Who wants to buy that? Yet Sotheby’s London has announced an invitation to photograph “1/4 Billion [sic] Dollars of Impressionist, Modern, & Contemporary Art” at its London headquarters, including the above-mentioned Bacon, along with a “Sensational Modigliani portrait” and “one of the most famous sculptures of all time” — Rodin’s “Thinker” — not to mention “one of Cezannes’ most perfect still lifes” (as opposed to one of his “less-perfect” ones?).